Transition between Kerr comb and stimulated Raman comb in a silica whispering gallery mode microcavity

Shun Fujii, Takumi Kato, Ryo Suzuki, Atsuhiro Hori, Takasumi Tanabe

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    We theoretically and experimentally investigated the transition between modulation instability and Raman gain in a small silica microcavity with a large free-spectral range, which reveals that we can selectively switch from a four-wave mixing dominant state to a stimulated Raman scattering dominant state. Both the theoretical analysis and the experiment show that a Raman-dominant region is present between transitions of Kerr combs with different free-spectral range spacings. We can obtain a stable Kerr comb and a stable Raman state selectively by changing the driving power, coupling between the cavity and the waveguide, and laser detuning. Such a controllable transition is achieved thanks to the presence of gain competition between modulation instability and Raman gain in silica whispering gallery mode microcavities.

    Original languageEnglish
    Pages (from-to)100-106
    Number of pages7
    JournalJournal of the Optical Society of America B: Optical Physics
    Volume35
    Issue number1
    DOIs
    Publication statusPublished - 2018 Jan 1

    ASJC Scopus subject areas

    • Statistical and Nonlinear Physics
    • Atomic and Molecular Physics, and Optics

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